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The available source of charge that pushes a charge through a circuit is A. alternating current. B. direct current. C. voltage. D. resistance.
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Asked 9/6/2012 12:21:46 PM
Updated 9/6/2012 12:36:57 PM
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User: The available source of charge that pushes a charge through a circuit is A. alternating current. B. direct current. C. voltage. D. resistance.

Weegy: Voltage V = IR; where I is the current in amps and R is the wire resistance in ohms. [ Rewritten, we have I = V/R, which is math talk for saying "apply a voltage V to a resistance R" and you'll get a current I. The current is formed of free electrons in the wire. That is, these are electrons that are not attached to the atoms of the material the wire is made of...like copper atoms for example. What many, if not most, people fail to understand is that these free electrons move at a fairly slow rate through a wire. This physical movement is called electron drift. [See source.] The reason current (energy) seems to travel instantaneously from the switch to the light, motor, A/C, or whatever, is because the signal (the electron wave/phase) travels at light speed through the wire. Light speed in wire is slower than in a vacuum, but it's still in the hundreds of thousands of km per second. That's why your lights seem to go on right away even though the free electrons are drifting about .024 cm/sec or so depending on the wire and voltage ]
kashton|Points 683|

Question
Asked 9/6/2012 12:21:46 PM
Updated 9/6/2012 12:36:57 PM
1 Answer/Comment
This conversation has been flagged as incorrect.
Flagged by andrewpallarca
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The available source of charge that pushes a charge through a circuit is: C. voltage.
Added 9/6/2012 12:37:01 PM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [6/23/2014 5:11:48 PM]
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